<?php

/**
 * @file
 * Contains infrequently used theme registry build functions.
 */

/**
 * Implements HOOK_theme().
 *
 * We are simply using this hook as a convenient time to do some related work.
 */
function _zen_theme(&$existing, $type, $theme, $path) {
    // Compute the conditional stylesheets.
    if (!module_exists('conditional_styles')) {
        include_once './' . _zen_path() . '/zen-internals/template.conditional-styles.inc';
        // _conditional_styles_theme() only needs to be run once.
        if ($theme == 'zen') {
            _conditional_styles_theme($existing, $type, $theme, $path);
        }
    }

    // Since we are rebuilding the theme registry and the theme settings' default
    // values may have changed, make sure they are saved in the database properly.
    zen_theme_get_default_settings($theme);

    // If we are auto-rebuilding the theme registry, warn about the feature.
    // Always display the warning in the admin section, otherwise limit to three
    // warnings per hour.
    if (function_exists('user_access') && user_access('administer site configuration') && theme_get_setting('zen_rebuild_registry') && $theme == $GLOBALS['theme'] && (arg(0) == 'admin' || flood_is_allowed($GLOBALS['theme'] . '_rebuild_registry_warning', 3))) {
        flood_register_event($GLOBALS['theme'] . '_rebuild_registry_warning');
        drupal_set_message(t('For easier theme development, the theme registry is being rebuilt on every page request. It is <em>extremely</em> important to <a href="!link">turn off this feature</a> on production websites.', array('!link' => url('admin/build/themes/settings/' . $GLOBALS['theme']))), 'warning', FALSE);
    }

    // Keep track of all the base themes.
    static $base_themes = array();
    $base_themes[] = $theme;

    // Add a "process" phase to come after the "preprocess" functions.
    if ($type == 'theme') {
        foreach (array_keys($existing) as $hook) {
            // Normally, preprocess functions are added to the registry after
            // HOOK_theme() returns, but if we add them first, they won't be re-added.
            if (function_exists($theme . '_preprocess')) {
                $existing[$hook]['preprocess functions'][] = $theme . '_preprocess';
            }
            if (function_exists($theme . '_preprocess_' . $hook)) {
                $existing[$hook]['preprocess functions'][] = $theme . '_preprocess_' . $hook;
            }
            // Add base theme process functions.
            foreach ($base_themes as $base_theme) {
                if (function_exists($base_theme . '_process')) {
                    $existing[$hook]['preprocess functions'][] = $base_theme . '_process';
                }
                if (function_exists($base_theme . '_process_' . $hook)) {
                    $existing[$hook]['preprocess functions'][] = $base_theme . '_process_' . $hook;
                }
            }
            // Add the theme process functions.
            if (function_exists($theme . '_process')) {
                $existing[$hook]['preprocess functions'][] = $theme . '_process';
            }
            if (function_exists($theme . '_process_' . $hook)) {
                $existing[$hook]['preprocess functions'][] = $theme . '_process_' . $hook;
            }
        }
    }

    // Manipulations only to be done by the base theme.
    if ($theme == 'zen') {
        // Insert zen_show_blocks_discovery() before template_preprocess_page().
        $existing['page']['preprocess functions'] = array_merge(array('zen_show_blocks_discovery'), $existing['page']['preprocess functions']);

        // Allow theme hook suggestions on theme_links.
        $existing['links']['pattern'] = 'links__';

        // The base theme registers region.tpl.php.
        $templates = array(
            'region' => array(
                'arguments' => array('elements' => NULL),
                'pattern' => 'region_',
                'path' => drupal_get_path('theme', 'zen') . '/templates',
                'template' => 'region',
                // drupal_find_theme_templates() requires this, so manually add it.
                'include files' => array(),
            ),
        );
        // We have to manually find template suggestions since phptemplate_theme()
        // is in charge of that, but runs before zen_theme().
        $templates += drupal_find_theme_templates($templates, '.tpl.php', $path);
        // We manually register the preprocess and process functions, since Drupal
        // won't auto-register template_preprocess or process functions.
        foreach (array_keys($templates) as $key) {
            $templates[$key]['preprocess functions'] = array(
                'template_preprocess',
                'zen_preprocess',
                'zen_preprocess_region',
                'zen_process',
            );
        }
        return $templates;
    }

    // Else return nothing.
    return array();
}

/**
 * Return the theme settings' default values from the .info and save them into the database.
 *
 * @param $theme
 *   The name of theme.
 */
function zen_theme_get_default_settings($theme) {
    $themes = list_themes();

    // Get the default values from the .info file.
    $defaults = !empty($themes[$theme]->info['settings']) ? $themes[$theme]->info['settings'] : array();

    if (!module_exists('domain_theme') && !empty($defaults)) {
        // Merge the defaults with the theme settings saved in the database.
        $settings = array_merge($defaults, variable_get('theme_' . $theme . '_settings', array()));
        // Save the settings back to the database.
        if (db_is_active()) {
            variable_set('theme_' . $theme . '_settings', $settings);
        } else {
            $GLOBALS['conf']['theme_' . $theme . '_settings'] = $settings;
        }
        // If the active theme has been loaded, force refresh of Drupal internals.
        if (!empty($GLOBALS['theme_key'])) {
            theme_get_setting('', TRUE);
        }
    }

    // Return the default settings.
    return $defaults;
}
